( 12 ) 



In 48 it is sharply demarcated from the black ground-colour, 

 while in 36 a more gradual transition is afforded by a 

 sprinkling of dark scales. The latter condition exists in 

 the Unyori specimen, and both are common in cenea. The 

 colour of the patch in 48 and in the Unyori example resem- 

 bles that of a rather deeply-tinted cenea, the Unyori example 

 differing, however, in its duller shade. The patch of 36 

 exhibits an approach to the whiteness of planemoides in its 

 pale yellow tint, which contrasts Bharply with the rich colour 

 of the ol her markings. 



i Natal Bpecimei i - the intense black ground- 



colour and comparatively short fore wings of the Natal cenea, 

 while the [Jnyori specimen | slightly longer fore- wings 



and the duller Fuscous tint of pla 



ind\ r 8v The p it tern of the under 



surface closely resembles that of the upper, as in both cenea 

 and The chief difference, in both these forms. 



is due to the duller, browner Bhade of the black ground-colour 

 of the parts in the resting position. Many of the 



markings also tend to spread and to become less sharply 

 demarcated. The general effect of these changes in back- 

 ground and markings is that the whole of the exposed pattern 

 looks obscure and •lull as compared with the upper surface. 

 There is a clear indication <>f the ' I ns. Ent, 



Soc., 1904, p. 683) on the under surfac ' 36, the pale colour 



[xli 

 of the basal patch streaming outwards in the. r >th inters] 

 (between commonly found 



in cenea, plat and other forms, is very faintly indicated 



in 48, and barely visible in the [Jnyori example. 



the ll<>pe Department, 

 Oxford University Museum, choosing it rather than 36, 

 because of the deeper tint of the hind-wing patch. This tint 

 is also found in the Unyori specimen, and is probably more 

 typical of the leiijlii form than the much paler shade of 



In addition to the individual difj between these 



three specimens described above it may be added that the 

 spot in the cell is undivided in .'!•">. hut divided in the other 

 two, the detached extremity being nearly obsolete in the Unyori 



